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1 -- <br /> j SEQUOIA ANALYTICAL <br /> 680 Chesapeake Dnve • Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> Hy Wa't�o�,-a r;✓ra�,..,.k,,,,w .a.,-fs.kSc,.`.�..rc7�>rh�r.j,ssGir—rz—"ra&rir-r5 . .r... mrr <br /> erwork Clint Project ID W0388, Reeves <br /> evesrrYExxon <br /> .x,x...r.r�,o,n�..�,�.x y{ w.,w�8rr)nx�,u.t,a`x,:..:.v r�� r.�u,wwx�..r �.d,,✓r4.,y��...0.x..*�:r,c.?.fpi.:�.Zr�...ti.xvc-,... <br /> ' >1710 Main Street <br /> {Escalon, CA 95320 <br /> ".,Attention Greg Stahl QC Sample Group 112-4773-5 Reported Jan 9, 1992 _ <br /> k J.�.. �.v Yr:-rr-f. ,'f:S�'6r.`r .a wekcooJyu�r;� ryh -.v?Psuv ht.r+" v..v^w�•vrow-veooati-wr��y�.ceo�....wrw.uw rut':i.r f'. �rm�rti�.>ernr r....."�"r<'°"'e� a�`y.� <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> ' Analyst k Miraftab A.%mftab A.Miraftab A-Miraftab <br /> Reporting Units pg/L pg/L pg/L ug/L <br /> Date Analyzed Jan 5, 1992 Jan 5, 1992 Jan 5, 1992 Jan 5, 1992 <br /> ' QC Sample# GSLK010592 GBLK010592 GBLK010592 GBLK010592 <br /> Sample Cone.- N D _ N D N D N D <br /> Spike Conc. <br /> ' Added: 10 10 10 30_ <br /> Conc. Matrix <br /> ' Spike: 10 10 10 31 J <br /> Matrix Spike <br /> ' % Recovery: 100 100 100 103 <br /> ' Conc Matrix <br /> Spike Dup.: 10 11 11 32 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery 100 110 110 107 <br /> ' Relative <br /> % Difference. 00 95 95 32 <br /> SEOUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> ll�- Relative%Difference Conc of M S -Conc of M S D x 100 <br /> a eee (Conc of M S + Conc of M S D) 2 <br /> P olect Manager 1124773 WAT <6> <br /> 1 <br />